I remember thinking that it was helping at about 6-8 weeks bu the doc should keep her on steriods until it does kick in ... hang in there! I've had great results on 6MP without a lot of symptoms other than elevated liver enzymes but they can now track that.
Diagnosed with Crohn's 2004 via pill camera Imuran (6MP) kicked into remission (along with modified diet) so went off in 2006.
2009/2010 acute flare and hospitalization - put back on Imuran. Currently taking 55 mg prednisone.
Current problem - protruding thrombosis hemorrhoid.